Method and means of embossing



Patented Nov. 8, 1927.

UNITED STATES HUGO MOCK, OF NEW YORK, N. Y.

METHOD AND MEANS OF EMBOSSING.

No Drawing.

This invention relates to an improved method and means of embossing and has for its particular object a provision of a method for making signs o ornaments with ralsed letters or figures.

A particular object of the invention is an economical method of making signs with embossed letters in which the embossing may be done by a method very similar to ordinary sign painting.

It is well known that at the present time to make a sign with embossed letters it is necessary to form the letters in relief or by stamping upon the background of the sign and if it is done in relief the material usually chosen is clay or similar plastic material to form the sign letters or figures and then the clay is painted or otherwise ornamerited.

By my improved method, I form the raised letters or figures by using a material which can be applied with a brush but which naturally swells or intumesces without the aid of heat. For this purpose, I use a material to form the letters which will swell upon contact with a liquid material employed on the brush, preferably Water.

For instance, I preparea powder of the following composition Cream of tartar (sodium bitartrate), 4; parts,

Baking soda (acid sodium carbonate), 9 parts,

Starch, 2 parts,

Casein powder or finely powdered dextrine, 2 parts, or instead of this I can add to the mixture of baking soda, cream of tartar and starch when I am ready to form the embossed letters, a thin liquid glue. Where the powder is taken ready to apply with the adhesive already mixed therein, all it is necessary to do w is to add Water to the mixture and the water upon contact with this effervescent material will cause the same to rise or swell. The letters are painted quickly upon the sign board or paper with this mixture and owing to the carbonic acid generated by the action of the water upon the mixture of cream of tartar and baking soda, a light material is produced inwhich the air bubbles are imprisoned by the casein, glue or other colloid used. The letters will retain their aerated character even when dry and are then painted with a waterproof lacquer or var- Application filed March 9, 1&26. Serial No. 93,537.

nish. After the waterproof lacquer or varnish is applied, then the desired pigment may be applied to the outer surface of the letters giving the pleasing effect of an embossed letter.

It will be understood that other acidulous material may be used instead of the cream of tartar and that other adhesives may be substituted for the casein or the glue. Also, when desired, other inert materials may be substituted for the starch such as magnesium carbonate, zinc oxide or other light materials which can be procured in the form of a fine powder. By using a composition of this character, it is not necessary to apply any heat to the letters as they will naturally in tumesce without the application of heat. It is also understood that the greater the amount of glue or other adhesive used, the firmer in character will be the form of the letters or figures made.

It will also be understood that if the surface or pigment of the sign upon which the letters or figures are drawn is Waterproof, then by the application of a Waterproof lacquer or varnish and then by the application of a waterproof paint or varnish containing pigment over the first lacquer or varnish, a permanent sign can be produced which is entirely waterproof.

Having fully described my invention, what I claim is 1. A method of making raised letters, figures or ornaments by painting said letters, figures or ornaments with a powdered mixture capable of evolving carbon dioxide and afterwards painting the outside of said letters, figures or ornaments with a durable aint.

2. A method of making raised letters, figures or ornaments by painting said letters, figures or ornaments with a moist mixture, capable of evolving carbon dioxide.

3. A method of sign painting by using paint capable of evolving a gas when wetted so that the lettering in said sign painting will become intumescent.

4. A method of sign painting by using paint capable of evolving a gas when Wetted and afterwards treating the outside of said lettering with a waterproof paint.

In testimony whereof I hereunto afiix my signature.

HUGO MOGK. 

